During a charity drive, Primary 5 raised 5 times as much money as Primary 3 on the first week. On the second week, Primary 5 raised another $304 while Primary 3 raised another $574. During the entire charity event, Primary 5 raised 3 times as much as Primary 3. What was the total amount raised by Primary 5?
|
Primary 5 (1) |
Primary 3 (2) |
Make p the same (2) x 3 = (3) |
Before |
5 u |
1 u |
3 u |
Change |
+ 304 |
+ 574 |
+ 1722 |
After |
3 p |
1 p |
3 p |
(1) = (3)
5 u + 304 = 3 u + 1722
5 u - 3 u = 1722 - 304
2 u = 1418
1 u = 1418 ÷ 2 = 709
From (2)
1 p = 709 + 574 = 1283
Total amount raised by Primary 5
= 3 p
= 3 x 1283
= $3849
Answer: $3849